820672412 has 24 divisors (see below), whose sum is σ = 1642220160. Its totient is φ = 351529200.

The previous prime is 820672409. The next prime is 820672417. The reversal of 820672412 is 214276028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820672417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54287 + ... + 67737.

It is an arithmetic number, because the mean of its divisors is an integer number (68425840).

Almost surely, 2^820672412 is an apocalyptic number.

It is an amenable number.

820672412 is an abundant number, since it is smaller than the sum of its proper divisors (821547748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

820672412 is a wasteful number, since it uses less digits than its factorization.

820672412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15641 (or 15639 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 820672412 is about 28647.3805434284. The cubic root of 820672412 is about 936.2459342914.

The spelling of 820672412 in words is "eight hundred twenty million, six hundred seventy-two thousand, four hundred twelve".